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today, I found a 2021 question, 2022 question, and 2023 question on the orthogonal hockey stick identity $${n\brace k}=\sum_{b=0}^{n-k}k^b{n-1-b\brace k-1}$$ for Stirling numbers of the second kind, ...
DroneBetter's user avatar
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In MSE posts, the author of a question is indicated by a blue rectangle. I think we should introduce a similar marking under the comment section of an answer, indicating the author of the answer. It ...
Super Cool Guy's user avatar
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This question is motivated by the concerns expressed in this post, in particular about the declining number of questions on the main site and the reasons for it. For context, the numbers have come ...
Sarvesh Ravichandran Iyer's user avatar
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There's this particular user (who shall remain nameless) who has a very high reputation, and many gold tag badges, who, I've noticed, tends to unilaterally close posts in those tags as duplicates. In ...
Bruno Andrades's user avatar
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This question How to embed the “Metrizable tangent disc topology” into Euclidean space? was posted on Nov 12 and got an answer, that was accepted on Nov 14, with the response that the space could be ...
PatrickR's user avatar
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How to edit this question, so it is reopened: I already tried: added references, more background information, responded to comments, adjusted the question accordingly to clarify it, added a ...
Attila Vajda's user avatar
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My case I was reviewing a first answer that appeared to be posted 5 minutes ago. The review panel does not show the question body, so I clicked into the question for contexts. Astonishingly, I found ...
Y.D.X.'s user avatar
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There are millions of unsolved questions on stack exchange that will probably never be answered because they got buried with history. That is why I'm suggesting to add a button that, when clicked, ...
Super Cool Guy's user avatar
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43 votes
4 answers
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I had the impression that the number of questions is significally decreasing. This prompted me to conduct a statistical analysis. Period Number of questions 2024-11-22 / 2025-11-21 34,038 2023-11-22 / ...
Paul Frost's user avatar
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From Solving for a diffraction grating's orientation and surface periodicity from it's diffracted beams, can the problem be inverted? I have the following: $$\mathbf{k_0} = -k_0 \mathbf{\hat{z}...
uhoh's user avatar
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I asked this question after finding the identity$$ \sum_{k=i}^{j-n}\left\{{k\atop i}\right\}\sum_{P,Q\in\mathbb N^n\atop{\forall d,P_d\ge Q_d\atop{\Sigma P=j-n\atop\Sigma Q=k}}}\prod_{d=1}^n{P_d\...
DroneBetter's user avatar
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1 answer
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I offered a bounty on this question a couple of days ago. After a while, I received a satisfactory answer and awarded the user the points. A few days later, I noticed that the user had either deleted ...
Shavit's user avatar
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At the moment, there are two separate tags, homotopy and homotopy-theory. The tag homotopy was created not too long ago, it has only two questions (and one deleted question) and an empty tag-info. The ...
Martin Sleziak's user avatar
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Is the following question appropriate on Math.SE? I would include solution-verification and proof verification tags. Can it be revised to be appropriate? If it can be made appropriate, I'd add a few ...
nickalh's user avatar
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1 vote
6 answers
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There is a bunch of semi-duplicates here about what to do about answers written in comments, but none, as far as I am aware, from a moderator. I will not make the case here about why answers in ...
Shaun's user avatar
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